Hollow shaft spinning wheel capable of controlling wall thickness

Abstract

The utility model discloses a hollow shaft spinning wheel capable of controlling the wall thickness, which comprises a wheel body, a main blade and an auxiliary blade are arranged on the circumferential surface of the wheel body, a transition circular arc is arranged between the main blade and the auxiliary blade, the upper end of the main blade is connected with an upper guide surface, the lower end of the auxiliary blade is connected with a lower guide surface, and the lower guide surface is connected with the wheel body. The distance H between the protruding points of the main edge and the auxiliary edge is 1-12 mm, and the circle center of the transition arc is opposite to the wheel body. When a product is machined, certain pressure and restraining force are applied to other parts of the product by the auxiliary blade while the product is subjected to spinning deformation of the main blade, so that the deformation of the product in the machining process and the stability of the wall thickness are controlled, and the size qualification rate and the corresponding quality of the product are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor production field especially relates to a hollow shaft of integrated motor. BACKGROUND

[0002] At present, new energy vehicles put forward higher requirements to acceleration and endurance mileage, so that the lightweight design of each part becomes a hot topic, and the hollow design is adopted in the motor rotating shaft to realize the lightweight of the driving motor, which not only improves the utilization rate in the machining process, but also enables the hollow shaft to join the cooling system in the running process, so that the overall temperature of the motor is reduced, and the energy consumption is reduced.

[0003] The rotating shaft of the motor needs to use a spinning machine in the machining process, the spinning wheel is a forming extrusion cutter on the spinning machine, and the existing general spinning wheel has a V-shaped outer ring structure (as shown in the figure). Figure 3 In the spinning process, it has high freedom and universality, and is suitable for spinning machining of more ordinary products. However, the new type of new energy motor shaft is generally hollow in structure for lightweight. When the traditional spinning wheel is used for spinning machining, because the wall thickness is thin, the thickness after spinning is not uniform, the deformation direction has too much freedom, and other problems, so that the product quality becomes unstable. SUMMARY

[0004] In order to overcome the defects in the prior art, the utility model provides a hollow shaft spinning wall thickness controllable spinning wheel, which comprises a wheel body, the circumferential surface of the wheel body is provided with a main blade and a secondary blade, a transition arc is arranged between the main blade and the secondary blade, the upper end of the main blade is connected with an upper guide surface, the lower end of the secondary blade is connected with a lower guide surface, the distance H between the protruding points of the main blade and the secondary blade is 1-12mm, and the center of the transition arc is away from the wheel body.

[0005] In order to better control the thickness of the shaft body below the main blade spinning, the radius of the main blade is 5-15mm, the radius of the secondary blade is 2-15mm, and the radius of the transition arc is 2-10mm.

[0006] The included angle between the upper guide surface and the lower guide surface and the vertical surface is 40-80°.

[0007] The utility model has the advantages that:

[0008] 1. When the product is machined, the remaining part is also subjected to a certain pressure and restraining force by the secondary blade while the product is deformed by the main blade spinning, so that the deformation and wall thickness stability of the product in the machining process are controlled, and the size qualification rate and the corresponding quality of the product are improved.

[0009] 2. The lower end of the new structure spinning wheel adopts a larger avoidance angle, so that the interference avoidance ability in the machining process is stronger.

[0010] 3. The spinning wheel of the structure is more solid and has higher extrusion steel due to the adoption of the double-blade structure. BRIEF DESCRIPTION OF DRAWINGS

[0011] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments, and are not meant to limit the present application. Furthermore, the same reference numerals are intended to denote the same components throughout the accompanying drawings. In the drawings:

[0012] Figure 1 is a structural schematic diagram of the present application.

[0013] Figure 2 is a schematic diagram of the processing state of the present application.

[0014] Figure 3 is a schematic diagram of the processing state of the existing structure

[0015] In the figure: main blade 1, transition arc 2, secondary blade 3, upper guide surface 4, lower guide surface 5, wheel body 6. DETAILED DESCRIPTION

[0016] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0017] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0018] In the description of the utility model, it is to be explained that, unless there is definite stipulation and limitation, the term "mount", "link", "connect" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be the intercommunication of two elements. For ordinary skilled in the art, the above-mentioned term can be understood by concrete case the specific meaning in the utility model.

[0019] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0020] In Figure 1 And Figure 2 A hollow shaft spinning controllable wall thickness spinning wheel, including wheel body 6, the circumference of the wheel body is provided with main blade 1 and vice blade 3, transition arc 2 is arranged between main blade 1 and vice blade 3, the upper end of main blade 1 is connected with upper guide surface 4, the lower end of vice blade 3 is connected with lower guide surface 5, the distance H between the protruding point of main blade 1 and vice blade 3 is 1-12mm, the center of transition arc 2 is away from wheel body 6.

[0021] Further, the radius of main blade 1 is 5-15mm, the radius of vice blade 3 is 2-15mm, and the radius of transition arc is 2-10mm.

[0022] Further, the included angle between upper guide surface 4 and lower guide surface 5 and the vertical surface is 40-80 °.

[0023] In the main blade position, a vice blade structure is added according to the product step thickness. And a avoiding structure, namely lower guide surface, is made under the vice blade structure. When the new structure spinning wheel is processed, the vice blade can simultaneously exert a transverse force on the processed product. The product is deformed by the main blade spinning at the same time, and the remaining part is also subjected to certain pressure and restraining force.

[0024] In Figure 3 In the original single V-shaped scheme spinning wheel, the product outer circle is prone to extrusion and overturning during spinning, which reduces the metal flowing to the inner hole and causes uneven wall thickness.

[0025] In Figure 2 In the design spinning wheel, due to the increase of vice blade structure, the spinning outer flash is suppressed, the metal flow direction is ensured, and the transverse force is applied to ensure the deformation and wall thickness of the part.

[0026] The above merely describes the embodiments of the present application and is not intended to limit the present application. The present application can be changed and modified in various ways by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A spinning wheel for spinning a hollow shaft with controllable wall thickness, comprising a wheel body (6), characterized in that: The circumferential surface of the wheel body is provided with a main blade (1) and a secondary blade (3), a transition arc (2) is arranged between the main blade (1) and the secondary blade (3), the upper end of the main blade (1) is connected with an upper guide surface (4), the lower end of the secondary blade (3) is connected with a lower guide surface (5), the distance H between the protruding points of the main blade (1) and the secondary blade (3) is 1-12mm, and the center of the transition arc (2) is away from the wheel body (6).

2. The spinning wheel for controllable wall thickness spinning of a hollow shaft according to claim 1, characterized in that: The radius of the main blade (1) is 5-15mm, the radius of the secondary blade (3) is 2-15mm, and the radius of the transition arc is 2-10mm.

3. The spinning wheel of claim 1, wherein: The included angle between the upper guide surface (4) and the lower guide surface (5) and the vertical surface is 40-80°.

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